added chainSync event

ethereum.go

@@ -80,6 +80,8 @@ type Ethereum struct {
 	keyManager *ethcrypto.KeyManager
 
 	clientIdentity ethwire.ClientIdentity
+
+	isUpToDate bool
 }
 
 func New(db ethutil.Database, clientIdentity ethwire.ClientIdentity, keyManager *ethcrypto.KeyManager, caps Caps, usePnp bool) (*Ethereum, error) {
@@ -107,6 +109,7 @@ func New(db ethutil.Database, clientIdentity ethwire.ClientIdentity, keyManager
 		nat:            nat,
 		keyManager:     keyManager,
 		clientIdentity: clientIdentity,
+		isUpToDate:     true,
 	}
 	ethereum.reactor = ethutil.NewReactorEngine()
 
@@ -371,6 +374,7 @@ func (s *Ethereum) Start(seed bool) {
 
 	// Start the reaping processes
 	go s.ReapDeadPeerHandler()
+	go s.update()
 
 	if seed {
 		s.Seed()
@@ -510,3 +514,23 @@ out:
 		ethlogger.Debugln("succesfully disestablished UPnP port mapping")
 	}
 }
+
+func (self *Ethereum) update() {
+	upToDateTimer := time.NewTicker(1 * time.Second)
+
+out:
+	for {
+		select {
+		case <-upToDateTimer.C:
+			if self.IsUpToDate() && !self.isUpToDate {
+				self.reactor.Post("chainSync", false)
+				self.isUpToDate = true
+			} else if !self.IsUpToDate() && self.isUpToDate {
+				self.reactor.Post("chainSync", true)
+				self.isUpToDate = false
+			}
+		case <-self.quit:
+			break out
+		}
+	}
+}